Question
How many lines other than those shown in the figure are
required to join each corner with another?Solution
The number of diagonals in a polygon of n sides is given by n(n-3)/2 Hence in an octagon (number of sides = 8) is given by 8(8-3)/2=20.
Pipe ‘A’ can fill a tank in 12 hours whereas pipe ‘B’ can empty it in 30 hours. If both pipes are opened together while pipe ‘B’ is closed a...
Pipe ‘A’ and pipe ‘B’, together can fill 20% of a tank in 4 hours while pipe ‘C’ takes 25 hours to empty it. ...
An inlet can fill a tank in 36 minutes, and an outlet can drain it in 54 minutes. Find the time required to fill half the tank when both pipes are open.
Two pipes A and B can fill a tank in 12 hours and 15 hours, respectively. Another pipe C can empty the tank in 10 hours. If all three pipes are opened t...
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Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 8 hours, respectively and pipe ‘C’ can empty the full tank in 12 hours. All three pipes are...
Pipe ‘A’ can fill a tank in 14 hours whereas pipe ‘B’ can empty it in 28 hours. If both pipes are opened together while pipe ‘B’ is closed a...
Pipe ‘A’ and pipe ‘B’, together can fill 20% of a tank in 7 hours while pipe ‘C’ takes 40 hours to empty it. ...
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 10 minutes and 12 minutes respectively. Pipe ‘C’ alone can empty the cistern in 12 minutes. If a...
Two inlet pipes M and N alone can fill a tank in 15 hours and 18 hours respectively and an outlet pipe P alone can empty the whole tank in 10 hours. Fir...
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